2. What is observed on performing the following:
Carbon
Chlorine
Hydrogen Oxygen
dioxide
Litmus test
Apply burning
splint to the gas
Colour of gas
Odour of gas
colourless
colourless colourless greenish yellow
3. Give a chemical test to distinguish between the following
gases.
(a) H, and CO2 (b) H, and 02
(c) CO, and so (d) HCl and HS
Answers
Answer:
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Explanation:
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Answer:
2.Hydrogen
A lighted wooden splint makes a popping sound in a test tube of hydrogen.
Oxygen
A glowing wooden splint relights in a test tube of oxygen.
Carbon dioxide
Carbon dioxide turns limewater milky. A lighted wooden splint goes out in a test tube of carbon dioxide but this happens with other gases, too. So the limewater test is a better choice.
Ammonia
Ammonia has a characteristic sharp, choking smell. It also makes damp red litmus paper turn blue. Ammonia forms a white smoke of ammonium chloride when hydrogen chloride gas, from concentrated hydrochloric acid, is held near it.
Chlorine
Chlorine has a characteristic sharp, choking smell. It also makes damp blue litmus paper turn red, and then bleaches it white. Chlorine makes damp starch-iodide paper turn blue-black.
3.When a glass rod dipped in the ammonia solution is brought near the mouth of the test tube containing HCl gas, dense white fumes are observed which are not in the case of hydrogen sulphide gas.
NH3+HCl⟶NH4Cl
(dense white fumes)